Mugwort has certain efficacy in preventing fetus, but it should be used in combination with other herbal medicines. Clinically, it is not recommended to use Mugwort alone for fetus prevention treatment. It can be used to stop the bleeding of the lower abdomen and vaginal bleeding. It is often combined with Aconite to stop the bleeding, and Si Wu Tang (remove Chuan Xiong) to harmonize the blood vessels, and then add Sang Fu Sheng, Scutellaria Baicalensis, and Radix et Rhizoma Polygonati to strengthen the effect of antifetus. However, it is necessary to pay attention to the dosage of mugwort leaves, because the mugwort leaves contain siderophorone, which has a certain degree of toxicity, and excessive use can cause adverse effects on the body, and the use of mugwort leaves is not recommended for people with Yin deficiency and blood heat, and blind use may lead to aggravation of the condition. Therefore, pregnant women need to be very cautious with the medication, and it is recommended to use it under the guidance of a physician or pharmacist and according to the specific conditions of the body, so as not to cause unnecessary damage to the pregnant woman and the fetus. If the body shows obvious signs of miscarriage, go to the hospital in time to apply drugs such as didrogestrel and progesterone for fetal preservation treatment as prescribed by the doctor.